An efficient multiclass mechanism for optical burst-switching networks

Abstract

Abstract-The novel applications require multiservice networks to guarantee quality of service (QoS). In this paper, we propose a multiclass admission control mechanism for providing QoS in optical burst-switched networks (OBS). The proposed mechanism admits bursts of a given service class according to network load and a class-associated parameter. Based on this parameter, referred as load level, it is possible to differentiate the burst blocking probability experienced by each service class. We also develop an analytical model for the proposed mechanism and evaluated its performance in different scenarios. Even when varying the offered load, the traffic amount of each service class, and the number of service classes, the proposed mechanism provides a lower blocking probability for the high-priority traffic in comparison with other similar admission control mechanisms.

An efficient admission control mechanism for optical burst-switched networks

“…In order to provide service differentiation, we propose the load-level-based admission control (LLAC) mechanism for OBS networks [7][8][9]. This mechanism admits bursts of a given service class according to the network load and a classassociated parameter.…”

Multilink Performance of the Load-Level-Based Admission Control Mechanism for OBS Networks

“…The Load-Level-based Admission Control mechanism (LLAC) assumes that the network employs a signaling protocol that does not require a positive acknowledgement for sending a burst, such as JET (Just-Enough Time) or JIT (JustIn Time) [1], implying that all OBS nodes must implement LLAC [6]. In addition, LLAC considers that each OBS node supports full wavelength conversion and a burst requires only one wavelength during its transmission.…”

“…In a previous work [6], we proposed an admission control mechanism for providing service differentiation in OBS networks. The idea behind the Load-Level-based Admission Control Mechanism (LLAC) is to reserve a different amount of wavelengths in a link for each service class.…”